Fano manifolds with Lefschetz defect 3

C. Casagrande, E. A. Romano, S. A. Secci

Let X be a smooth, complex Fano variety, and delta(X) its Lefschetz defect. It is known that if delta(X) is at least 4, then X is isomorphic to a product SxT, where dim T=dim X-2.…